The result is /opt/local/bin/minicom, and, if MacPorts were installed properly, should already be in the PATH.

Before using minicom, the default configuration should be created:

$ sudo touch /opt/local/etc/minirc.dfl
$ sudo minicom -s

Additional configurations can be created, for example by saving the default configuration to a configuration with another name, for example dbg. The serial port is stored in the configuration, so it is not needed to specify it every time.

Further use of this new configuration is possible by refering to the given name: